Mandrel.



F. C. SMITH.

MANDREL.

APPLICATION HLED JUNE 26. 191.3.

Patented Sept. 12, 1916.

W TNESSES. INVENTUR m: NOAH-4'5 PETERS cu. mmmumn msumcram p c with amandrel.

FREDERICK C. SMITH, 0F PORT ARTHUR, TEXAS.

MAN'DREL.

- Specification of Letters Patent.

Patented Sept. 12, 1916.

Application filed June 26, 1913. Serial No. 775,832.

To all whom it may concern Be it known that I, FREDERICK C. SMITH, acitizen of the United States, residing at Port Arthur, in the county ofJ efi'erson and State of Texas, have invented certain new and usefulImprovements in Mandrels, of which the following is a specification.

This invention relates to new and useful improvements in collapsiblemandrels.

The object of theinvention is to provide a device of the characterdescribed upon which may be rolled bolts of flexible material such asmanufactured roofing, which is usually made of felt or some otherfibrous body, which is saturated with, and whose sides are covered by,water-proof material, such as asphaltum or some other similar material.This mandrel may also be used for rolling other similar materials, suchas paper or fibrous goods, which, in their preparation for market, areformed into rolls. 7

In rolling thegoods above described it is usually necessary to use amandrel, and, unless the mandrel is collapsible, when the roll is formedthereon it is impractical to remove the mandrel, by reason of the factthat the material is so tightly wound thereon that the mandrel cannot beremoved, and consequently a separate mandrel would have to be used foreach roll.

It is the object of this invention to provide a mandrel which whenplaced in the rolling machine will be held firmly against collapsing,but after the roll has been removed from said machine the mandrel may ibe easily collapsed and removed from the roll, and again used forrolling the succeeding rolls, and consequently only one mandrel isnecessary and the rolls, when prepared for market, will not beencumbered A further feature in the improved construction whereby themandrel may be easily placed in the rolling machine for the formation ofa roll and readily removed therefrom.

With the above and other objects in View the invention has particularrelation to cortam novel features of construction, operation andarrangement of parts, an example of which is given in this specificationand illustrated in the accompanying drawings, wheren:

Figure lis a side elevation of the mandrel inits collapsed position.Fig. 2 is an end view thereof. Fig. 3 is a side elevation of theinvention resides ,tion sought to be of the mandrel in its expandedposition, and asused when the roll is being formed thereon. Fig. 4 is anend view thereof. Fig. 5 is a side elevation of the rolling machine withthe mandrel therein, showing a roll of material wound on the mandrel;and Fig. 6 is an end view thereof. Referring now more drawings, whereinlike numerals of reference designate similar parts in each of thefigures, the numeral 1 refers to the framework of the rolling machinewhich has alined bearings 2 and 3 arranged, respectively, on each endthereof. The bearing 2 is open above, as shown in Fig. 6, and a shortshaft 4 normally rests therein. Alined with the shaft 4 on the otherside"of the machine is a shaft 5 which is rotatably mounted in thebearings 3 and 6, the latter of which is supported upon the upper end ofthe support 7. This shaft 5' is also slidable longitudinally in itsbearings, and is operatively connected with its driving mechanism orshaft 8, which 'receivesrotation from a suitable motor, not shown. Anypreferred form of drive mechanism may be used, and it is not thoughtnecessary to specifically'describe the mechanism shown. his mechanism,however, may be readily connected with and disconnected from the motorby means of the clutch 9 in a wellknown manner, as, for instance, ahandlever 9 having suitable connections 9 with said clutch. I preferablydrive the shaft 5 from the shaft 8, by means of a friction wheel orpulley 5 having driving contact with a grooved friction pulley 8, fixedon the shaft 8, said pulley 5 being feathered to the shaft 5 so that thelatter may move lengthwise through said 'pulley' 5 without displacingthe same from the groove of the pulley 8.

The mandrel itself comprises the invenprotected hereby, and said mandrelwill now be described.

The numerals 10 and 11 designate, respectively. two bearing *membersforming the respective heads or ends of the mandrel. These memberspreferably consist of short stud shafts or cylindrical blocks, formed ofmetal or some other durable material. To the inner end of one of saidheads, shown as being the head 10, is secured a hollow bar or shaft 12,and to the inner end of the opposite head is secured a solid bar orshaft 13, which telescopes within the bar or shaft particularly to the12, said shafts being slidable, relative to one another. The bar orshaft 12 has oblong slots 14: in both sides thereof and extending intothe hollow thereof, and the said shaft 13 has a pin 15 fixed thereto,which projects out tllIOllg'h the slots 14:. This pin limits thelengthwise movement of the shaft 13 relative to the shaft 12, saidmovement being limited by the length of the slots 14:. A plurality,preferably four, material-supporting members comprising in the presentembodiment of the invention, round bars or hollow shafts 16, 17, 18 and19 are provided, of a length preferably equal to the desired length ofthe roll to be formed, and these respective bars or shafts are connectedat their respective ends to the stub shafts or heads 10 and .11, bymeans of short links 20, 20, 21, 21, 22, 22, and 23, 23, said linksbeing pivoted at their outer ends to the re spective ends of thecorresponding bars or shafts, and at their inner ends to said stubshafts 10 and 11. The material-supporting members upon which the roll isformed remain in normally expanded relation during the formation of theroll until the stub shafts 10 and 11 are moved apart and the links abovedescribed are operated so as to move the bars 16, 17, 18 and 19 closetogether, consequently collapsing the mandrel, and permitting easy andready removal of the completed roll of material. Conversely, a movementof the heads or stub shafts toward each other operates through the linksto expand the mandrel into position ready for the formation of a newroll thereupon. In this manner, I have provided a mandrel, thematerial-supporting members of which are capable of two positions, anexpanded position in which the roll of material is formed, and acollapsed position to permit removal of the mandrel from the roll andits use for the formation of other rolls.

The outer ends of the shafts 10 and 11 have centrally located sockets21- and 25 to receive the respective inner ends of the shafts 1 and 5,when the mandrel is in position in the rolling machine and the roll ofmaterial is being formed thereon. The shaft 5 has a collar 26 fixedthereon, interposed between which and the bearing 6 is a coil spring 27,which tends to force said shaft 5 toward the mandrel and hold the innerend of said shaft in the socket 25, and the inner end of said shaft 4 inthe socket 24.

Near the inner end of shaft 5 is a pin 28 extending each way from saidshaft and fitting into a corresponding transverse groove 29, across theouter end of the head or shaft 11. The pin 28 locks in the groove 29 andforces the mandrel to rotate with the shaft 5. However, any otherpreferred means for locking these shafts so that they will rotatetogether may be adopted, such as by making the socket 25 square andshaping the inner end of said shaft 5 to conform thereto. VVhen themandrel is in position in the rolling machine the free end of thematerial 30 is manually rolled around the mandrel, and the shaft 5 thenoperatively connected with the driving mechanism which operates torotate the mandrel and wind the roll thereon. hen the roll is formed tothe desired size it is then grasped manually and forced against shaft 5,which slides back in the bearings 3 and 6 so as to disengage the socket24 from the inner end of the shaft at. The outer end of this shaft ishinged as at 81 to an adjustable support 81, projecting from thecorresponding end of the frame 1, and when the inner end of shaft 4 hasbeen disengaged from the socket 24: said shaft may then be lifted out ofits bearing 2 and the roll removed from the rolling machine. The mandrelmay then be manually collapsed very readily and removed from the roll.

When it is desired again in the machine for the formation of the nextroll, the socket 25 is engaged over the inner end of the shaft 5 andsaid shaft forced back in its bearings, as before described, and theshaft 1 is then manually swung around into its bearing 2 and its freeend brought into alinement with the socket 4c and the push of the coilspring 27 against the collar 26 will force the shaft 5 and the mandreltoward the free end of the shaft 4:, and cause said free end to engagein the socket 24, and hold the mandrel expanded. The support 31 may beadjusted toward and from the supporting frame by means of hand screw 82operable by a hand wheel 32 upon which hand screw said support 31 ismounted, as shown in Fig. 1, so that mandrels of different lengths maybe accommodated to the rolling machine. From the descriptionhereinbefore set forth it is obvious that the material may be woundtightly on the mandrel and thus formed into a compact roll which willthereby be more evenly and compactly formed, and will occupy thesmallest amount of space, and when completed the mandrel may be easilyand quickly removed therefrom.

lVhile I have shown only one form of my device it is apparent that themechanical construction thereof may be varied without departing from theprinciple of the inven tion, and I desire to reserve the right to alterthe mechanical construction thereof, so long as I do not depart from thescope of the appended claims.

What I claim is 1. In a device of the class described, the combinationof a frame provided with bearings, stub shafts journaled in saidbearings, one of said shafts being endwise movable, a spring acting uponthe latter shaft, and a mandrel carried by said shafts and compristoplace the mandrel ing a plurality of bars on which a roll of materialmay be wound and having normally expanded relation while said roll isbeing wound thereon, two slidably connected members having heads attheir outer ends provided with means fitting said stub shafts, and linksconnecting said slidably connected members with opposite ends of saidbars respectively to collapse the bars upon sliding movement of saidmembers and permit the roll has been wound.

removal of said mandrel from the material In testimony whereof I havehereunto when the roll has been wound. signed my name in the presence oftwo sub- 2. A mandrel comprising a plurality of scribing witnesses.

bars upon which a roll of material may be wound and having normallyexpanded rela- FREDERICK SMITH shaft slidingly fitted therein, theshafts having heads fixed on the outer ends thereof provided withsockets to engage supporting means for the mandrel, and links pivoted toheads and to the opposite ends of said bars and capable of collapsingthe bars upon the sliding movement of the parts of said telescopic shaftto permit the removal of said mandrel from the material when the tionwhile said roll is bemg wound thereon, Witnesses: and a central mountingdevice for said bars L. E. BARROWS, comprising a tubular shaft and asecond W. E COACH.

Copies of this patent may be obtained tor five cents each, by addressingthe "Commissioner 01' ratentl, Washington, D. C.

